The Universe. Our Solar System.

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Our Solar System is made up of the Sun, eight planets with their satellites, dwarf planets and small solar system bodies. The Sun is the central body.
  • THE SUN consists mainly of two gases: hydrogen and helium.
  • PLANETS are spherical bodies which revolve around the sun. They all move in elliptical orbits. Planets are much larger than other celestial bodies which orbit the Sun.Mercury, Venus, Earth and Mars are made up mainly of rock. Jupiter, Saturn, Uranus and Neptune are made up mainly of gases.
  • DWARF PLANETS are spherical bodies which orbit the Sun. They are smaller than other planets.
  • SMALL SOLAR SYSTEM BODIES are other celestial bodies which orbit the Sun. They include asteroids, comets and satellites.




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A star: THE SUN. edit
PIA03149.jpgThe sun is a big star, located in the center of the solar system. All the planets of the solar system is spinning in orbita. The mean distance from the Sun to the Earth is about 149,600,000 kilometers. The sun was created 4,650 million years ago. As all stars, the sun is spherical. According to scientists the sun is composed of 9 parts:
- The Core.
- Radiant Zone.
- Convective Zone
- Photoesphere
- Cromosphere.
- Corona
- Sunspots
- Granulation
- Solar Wind.

Planets: Mercury. edit
mercurio.jpgMercury is the closest planet to the Sun, but surprisingly, not thehotest.
Mercury hasn't got an atmosphere, so any heat, the planet get from the Sun quckly escapes back into the space. Temperatures can still get as high as 427ºC which is 61 times hotter than the average temperature on the Earth! But because there is nothing to hold in the heat, Mercury can also reach temperatures as low as -173ºC, almost twice as cold as the lowest temperature ever recorded on the Earth. No atmosphere also means the planet doesn't have a sky! If you could visit Mercury, you would be able to see stars at daytime and the sun would look twice as big. Mercury is a smaller than Jupiter.

Planets: Venus. edit
Venus is a planet very hot. Is the second planet.Venus has a slow retrograde rotation. The inside of venus is similar to Earth

Planets: Earth. edit
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The Earth is the third planet from the Sun.
In the Earth is the only planet with life.
The Earth is a planet in the solar system go around the Sun.
The Earth formed about 4.53 billion years ago and life appeared a billion years after.
The Earth isa terrestrial planet, which means it is a rocky body, not a gas giant like Jupiter.
It is the largest of the four terrestrial planets of the solar system in size and mass, and is also the one with the highest density.

Planets: Mars. edit
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Mars is the fourth planet from the Sun in the Solar System.
Marsorbitsolarsystem.gifMars is often described as the "Red Planet" as the iron oxide prevalent on its surface gives it a reddish appereance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and porlar ice caps of Earth. Mars has two moons. Mars’ average distance from the Sun is roughly 230 million km and its orbital period is 687 days. Mars can be observed from Earth, but the latest detailed information comes from four active probes on or in orbit around Mars as of 2012: Mars Odyssey, Mars Express, Mars Reconnaissance Oribter, and Opportunity rover.

Planets: Jupiter. edit
220px-790106-0203_Voyager_58M_to_31M_reduced.gifThis is Jupiter.
It is the fifth planet in the solar system and the biggest planet in the galaxy.
It's sixty - two moons to around the this planet.
It is a gas giant with mass one-thousand than of the sun.
Jupiter is got a Great Red Spot.
This planet is red, yellow, brown, white and blue.
Jupiter is primarily composed of hydrogen with a quarter of its mass being helium.
it may also have a rocky core of heavier elements. Because of its rapid rotation
Jupiter's upper atmosphere is composed of about 88–92% hydrogen and 8–12% helium
by percent volume or fraction of gas molecules.
Jupiter's mass is 2.5 times that of all the other planets in our Solar System combined
In 1610, Galileo Galilei discovered the four largest moons of Jupiter—Io, Europa, Ganymede and Callisto (now known as the Galilean moons)—using a telescope; thought to be the first telescopic observation of moons other than Earth's

Planets: Saturn. edit
saturno.jpgSaturn is the sixty planet of the Solar System.
Saturn is the second biggest planet of the Solar System , after Jupiter.
Saturn is the planet that has more rings.
Saturn is make of gase.
Saturn has got forty- eigth moons.
Saturn has got sixty-one satellites.
The color of Saturn is bronw.

Planets: Uranus. edit
_urano.jpgUranus is the third biggest planet in the solar system and the only planet that rotates on its side. Scientists think it may have been knocked over onto its side by another planet long .
This means that some parts of Uranus can't be reached by the Sun for long periods of time. Some nights can last as long as 40 Earth years .
Uranus was the first planet to be discovered by a telescope by Sir William Hershel in 1781.
The core of the planet is made up of ice and rock making it the coldest planet in the solar system with temperatures of -224°C, 32 times colder than the average on Earth.
Even though you could see it without a telescope, it hadn't been noticed before that time because it is quite dim and has a slow orbit.

Planets: Neptune. edit
Neptune.jpg
Galileo discovery Neptune on December 28, 1612.
Neptune is the eighth and farthest planet from the Sun in the Solar System.
Neptune is 17 times the mass of the Eart.
Neptune is similar to Uranus.
The interior of Neptune, like that of Uranus.
One difference between Neptune and Uranus is the typical level of meteorological activity.
The average distance between Neptune and the Sun is 4.50 billion km
Neptune has 13 moons.
Neptune's second satellite, by order of discovery
At high altitudes, Neptune's atmosphere is 80% hydrogen.
In the wake of the discovery, there was much nationalistic rivalry between the French and the British over who had priority

Dwarf Planets: Ceres. edit
planeta_ceres.jpgThis is Ceres, is the smallest planet.
Ceres It is a body some 950 km (590 mi) in diameter, comprising about a third of theof the Discovered on 1 January 1801 it was the first asteroid to be identified, though it was classified as a planet at the time. It is named after Ceres, t of growing plants, the harvest, and motherly love.
The Cererian surface is probably a mixture of water ice and various such as carbonates and clays. It appears to be differentiated into a icy an ocean of liquid water under its surface. From Earth, the apparent magnitude of Ceres ranges from 6.7 to 9.3, and hence even at its brightest it is still too dim to be seen with the naked eye except under extremely dark skies. The unmanned spacecraft, launched on 27 September 2007 by NASA is expected to be the first to explore Ceres after its scheduled arrival there in 2015, after the spacecraft leaves the asteroid which it has been orbiting since July 2011.

Dwarf Planets: Pluto. edit
pluton.pngPluto is the small planet in the Solar System. From September 7th of 2006 has the number 134340, issued by the Minor Planet Center.

There are four moons of Pluto known. The largest satellite of Pluto is Charon. Charon, of all the moons in the solar sistem, is the largest compared to its host planet, ie no other moon is approximately the size of the planet as it orbits.

So similar size with Pluto and Charon makes them cause the effect of double planet, the other system "satellite-planet" that has an effect similar to that of Pluto and Charon is the case of the Earth and Moon.

Dwarf Planets: Eris. edit
Erisis a dwarf planet, likePluto, recentlyadded tothis category.

ThenameEriswas proposed by thediscovery teamastronómica.

Erisaccepted by the communitycomes fromthe Greek goddessof discord

Is the largestdwarf planet,and the largesttrans-Neptunianobjectas it isslightly largerthan Pluto.

Is considered thetenth planetin the solar systemby its discoverersandthe media.

Eriswas discoveredby the team of Michael Brown, ChadTrujillo and David Rabino witzon January 8, 2005 .

Has an orbital periodof about560 yearsand is nowalmost atthe furthest distancefrom the Sun .